Given a docs-ref-services folder location, find preview readmes and generate redirection config

Extend-Redirection.ps1

param(
    $targetFolder,
    $language,
    $previewMoniker
)

$results = gci -Path $targetFolder -Filter "*-pre.md"

foreach ($readme in $results) {
    Write-Host "{"
    Write-Host ('    "source_path": "docs-ref-services/' + $readme.Name + '",')
    Write-Host ('    "redirect_url": "/' + $language + '/api/overview/azure/' + $($readme.Name.replace("-pre.md","")) + '?view=' + $previewMoniker + '",')
    Write-Host ('    "redirect_document_id": true')
    Write-Host "},"
}